PROBLEM TO BE SOLVED: To provide a method for manufacturing a sheet fused body that has sealed edges in which the edges of a plurality of sheets are fused in a stacked manner, is excellent in the flexibility and the texture of the sealed edges, and also has practically sufficient fusion strength.SOLUTION: One surface of a belt-like sheet stack 10 (a diaper continuous body) in which a plurality of sheets are stacked is brought into contact with a support member 21 having light-passing sections 27 that allow laser light 30 to pass therethrough. Then, the belt-like sheet stack 10 in a pressurized state is irradiated with laser light 30 of a wavelength which is absorbed by the sheets constituting the sheet stack 10 and causes the heat generation of the sheets through the light-passing sections 27 from the support member 21 side, thereby dividing the belt-like sheet stack 10 into parts, and simultaneously fusing the cut edges of the plurality of sheets in the pressurized state generated by the division to each other in order to form sealed edges 4 (side sealed sections) in which the edges of the plurality of sheets are fused in a stacked state.【課題】複数枚のシートの縁部が重なった状態で融着したシール縁部を有し、該シール縁部の柔軟性、肌触りに優れ、且つ実用上十分な融着強度を有するシート融着体の製造方法を提供すること。【解決手段】複数枚のシートが重ねられた帯状のシート積層体10(おむつ連続体)の一方の面を、レーザー光30が通過可能な光通過部27を有する支持部材21に当接させ、加圧状態となった帯状のシート積層体10に対して、支持部材21側から光通過部27を介して、該シート積層体10を構成するシートに吸収され該シートを発熱させる波長のレーザー光30を照射することにより、帯状のシート積層体10を分断するのと同時に、その分断によって生じた前記加圧状態にある複数枚のシートの切断縁部どうしを融着させて、複数枚のシートの縁部が重なった状態で融着したシール縁部4(サイドシール部)を形成する。【選択図】図1
